[BitmapFetcher] Added reference to OnFetchComplete url

chrome/browser/search/suggestions/image_fetcher_impl.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_SEARCH_SUGGESTIONS_IMAGE_FETCHER_IMPL_H_
 #define CHROME_BROWSER_SEARCH_SUGGESTIONS_IMAGE_FETCHER_IMPL_H_
 
 #include <map>
 #include <utility>
 #include <vector>
@@ skipping 20 matching lines @@
 
   void SetImageFetcherDelegate(ImageFetcherDelegate* delegate) override;
 
   void StartOrQueueNetworkRequest(
       const GURL& url,
       const GURL& image_url,
       base::Callback<void(const GURL&, const SkBitmap*)> callback) override;
 
  private:
   // Inherited from BitmapFetcherDelegate. Runs on the UI thread.
-  void OnFetchComplete(const GURL image_url, const SkBitmap* bitmap) override;
+  void OnFetchComplete(const GURL& image_url, const SkBitmap* bitmap) override;
 
   typedef std::vector<base::Callback<void(const GURL&, const SkBitmap*)> >
       CallbackVector;
 
   // State related to an image fetch (associated website url, image_url,
   // fetcher, pending callbacks).
   struct ImageRequest {
     ImageRequest();
     // Struct takes ownership of |f|.
     explicit ImageRequest(chrome::BitmapFetcher* f);
@@ skipping 23 matching lines @@
   ImageFetcherDelegate* delegate_;
 
   net::URLRequestContextGetter* url_request_context_;
 
   DISALLOW_COPY_AND_ASSIGN(ImageFetcherImpl);
 };
 
 }  // namespace suggestions
 
 #endif  // CHROME_BROWSER_SEARCH_SUGGESTIONS_IMAGE_FETCHER_IMPL_H_